SCENOPINIDAE OF THE WORLD 169 



119. Brevitrichia addacifons, new species 



Figure 113 



Male. — Head cream; eyes red-brown, metallic above, metallic 

 black-green below; frons small, triangular; ocellar tubercle brown, 

 pollinose; ocelli clear to red. Mouthparts well developed, haustellum 

 red-brown, remainder cream; antenna as figured; first segment brown, 

 second segment orange-brown, third segment brown. 



Thorax dorsum black-brown with brown and tan pollinose scales, 

 lateral margins yellow; humeral and supra-alar calli cream; meso- 

 scutellum mostly black-brown and gray pollinose, lateral margins 

 yellow; pleural areas pollinose with yellow, red-brown and brown. 

 Wings smoky, veins tan, see figure; halter stem brown, knob cream 

 with a tan lateral band. Legs red-brown with pollinose scales. 



Abdomen second segment with a broad anterior band of black 

 with a broad central posterior stem and narrow lateral extensions 

 like a "T," remainder of posterolateral portion pristine white, remaining 

 segments white dorsally. Ninth tergum with base black, remainder 

 white pollinose. See figure for details of genital structures. 



Female. — Head cream; eyes red-brown, metallic, with a moderately 

 broad postocular ridge without spots of color; frons broad, unmarked, 

 a few white hairs; ocellar triangle set off, red-brown, pollinose; ocelli 

 clear to red-brown; groove at upper angle of eye directed toward 

 back of ocellar triangle, fading, not reaching back of head, a central 

 notch in back of ocellar triangle. Antennae with first two segments 

 cream, third red-brown, shaped as shown in figure. 



Thorax dorsum red-brown, covered with gray pollinose scales in 

 the center, with two lateral tan bands, area above humeral callus 

 and the lateral margins cream, area in front of scutellum orange 

 with two anteriorly directed arms; humeral and supra-alar calli 

 white. Mesoscutellum red-brown over middle half, lateral angles 

 cream pollinose. Pleura with prothorax white; anepisternum white, 

 with usual dark patch; katepisternum red-brown, with white dorsal 

 border. Wings hyaline, smoky, veins clear; halter stem brown, knob 

 white. Legs femora red-brown, tibiae and tarsi tan-brown. 



Abdomen segments brown with white lateral patches. Eighth 

 segment yello^\'-brown, shaped as figured. Ninth tergum without 

 bristles, only long thin hair; see figure. 



Length: Male body 2.7 mm., wing 2 nun.; female body 2.8 mm., 

 wing L8 mm. 



Type-locality: Antelope Springs, 8 mi. s.w. Deep Springs, Imperial 

 Co., California; 1 July 1961 (G. L Stage). 



Holotype: Male (UCalD) 75. 



